Closure cap



Oct. 31, 1939. s R Ngg 2,178,085

CLOSURE CAP Filed July 19, 1958 Patented Got. 31, 1939 UNITED STATES PATENT OFFIC 2,178,085 CLOSURE oar David A.' Sprigings, Bloomfield, N. 1., assig'nor to Standard Container, Inc., Bloomfield, N. J., a corporation of New Jersey Application July 19, 1938, Serial No. 220,043

Claims. (01. 215-44) This invention relates to closures for bottles, jars and various other types of receptacles and has for its object the provision of a closure cap of simple construction; one which is easily placed 5 on and removed from its receptacle and which is so shaped as to enable it to be engaged by the lugs on the receptacle and thereby held firmly in seated position. Those portions of the bead which co-operate in the placement and maintenance of the cap in position on the receptacle are located on the inside of the cap and are not visible externally of the cap and since the skirt portion of said'cap is not distorted or deformed, the exterior of the cap presents a smooth,' unbroken appearance.

.More particularly, the invention conte lates the provision of a cap formed with a dow ardly extending skirt portion having its lower end soshaped that when said lower end is rolled upwardly within the body of the cap', it will provide a continuous, unbroken and undistorted bead encircling the lower end of the cap, the bead being ofsubstantially the same cross-sectional shape throughout its entire length, but of varying diameter. I am aware that prior to this invention, it was common in this art to utilize a rolled-up bead on'the lower end of a skirt portion of a cap for engaging with lugs provided on the neck of abottle or other receptacle. However, in such prior uses, the bead so utilized was distorted or deformed at intervals to produce projecting lug elements adapted for engagement beneath the lugs on the receptacle.

The production of these deformed or projecting parts on a bead requires additional manufacturing operations and increases cost and they sometimes tend to deform parts of the cap and provide an ill-fitting closure.

' With my improved structure, mashing, compressing or deforming of the bead after its initial formation, is eliminated. It is merely necessary to roll up the bead, and the bead by its shape as initially rolled-up and without further operations, will co-operate to produce a strong wellfltting' closure. .7

In the accompanying drawing forming a part hereof, Fig. 1 is a sectional view of the tap before the bead has been formed thereon; Fig. 2 is a sectional view through the unfinished cap of Fig. 1, the section being taken on the line 2--2 of Fig. 1, looking in the direction of the 5 arrows; Fig. 3 is a sectional view through the completed cap, the view being taken on the line 3-3 of Fig. 5, looking in the direction of the arrows; Fig. 4 is a sectional view taken at right angles to-that of Fig. 3, and on the line 4-4 m of Fig. 5, looking in the direction of the arrows; Fig. 5 is a view of the underside of the cap; and Fig. 6 is a sectional view through the upper portion of a receptacle showing the cap in position thereon.

In the drawing. the reference numeral i indicates the top portion of a cap made in. accordance with the invention. The cap is preferably formed by being pressed from a single section.

of sheet material which after being pressed, as-

sumes the form shown in Figs. 1 and 2. The

' cap in the unfinished condition shown in Fig. 2 is thus provided at the marginal edges of the top I with a downwardly extending annular flange or skirt portion 2, the lower edge of which is undulated or curved as clearly shown in Figs. 1 and 2. For example, certain portions of the lower edge of the skirt 2 are downwardly curved as indicated at 3 in Fig. 1, and these downwardly with upwardly curved portions 4. This irregularly shaped or unduiated lower edge of the skirt 2 is rolled upwardly within the body of the cap and it results in the formation of a continuous bead 5 wholly located within the cap and cealed by the skirt thereon.

The irregularly formed or undulated lower edge on the skirt 2,'which is curledor rolled upwardly to formthe bead 5, results' in the production of a bead-0f" tapering formation or gradually reduced diameter at certain points in its length. For example, the downwardly curved portions 3 on the lower edge of skirt 2 produce the portions 6 of the bead of relatively large cross-sectional diameter, while the upwardly curved edge portions 4' on skirt} result in the production of the parts or areas 1 of relatively small cross-sectional diameter. The entire head so formed, and clearly shown in Fig.

' curved portions of the lower edge of skirt 2 merge 5,.is thus for its entire length of the same 'cross'- A part of the receptacle adapted for reception of the improved closure cap is shown at 8. in

II on the top edge portion of the bead, to securely and firmly seat the cap in position. The bead is thus so shaped that the opening defined by it through which the ,top of the bottle projects is thus of smoothly oval formation A gasket l2 of suitable material is of course provided in the inside of the cap in the conventional manner.

It will be clear from the foregoing that by the simple operation of rolling up a bead on the lower edge of the skirt portion of the cap blank a head of such shape isprovided that it will efflciently co-operate with lugs or other projections formed on the receptacle neck to seat the cap in position. Once the bead is rolled up or otherwise initially formed, no deformation, flattening, distortion or other operations common in the production of sheet metal closure caps are necessary.

While I have shown the'lower edge of the cap so curved or undulated to produce two diametrically located portions of the bead of minimum diameter, it will be apparent that by changing the undulated shape. of the lower edge of the skirt 2, the resultant bead formed by rolling up said edge may be provided with a greater number of portions in the bead of reduced diameter. Various other changes may be made in the structure without departing from the spirit of the invention, as defined by the annexed claims,

What I claim is:

1. A closure cap having a dependent skirt portion formed with an integral rolled-up continuous bead at its lower end, said head being located interiorly of the cap and projecting inwardly from the skirt and being concealed thereby, the bead being for its entire length of the same crosssectional shape and having portions of gradually reduced cross-sectional diameter and of decreased interior projection from the skirt, said portions being located diametrically opposite one another on the skirt.

, 2. A closure cap having a dependent skirt portion formed with an integral rolled-up continuous bead extending without interruption or distortion completely around the edge of the skirt, said bead projecting inwardly from and concealed by the skirt portion, portions of said bead at spaced points being of less cross-sectional diameter than other portions thereof and of less lateral projection toward the center of the cap than other portions, all portions of the bead being of like cross-sectional shape.

3. A closure cap having a dependent skirt portion formed at its lower edge with a continuous,

undistorted integral rolled-up bead directed inwardly from the skirt, said bead having spaced areas of gradually reduced cross-sectional diameter whereby an opening defined 'by the bead is of oval formation, all portions of the bead being of like cross-sectional shape.

4. A closure cap having a top and a dependent skirt portion, the lower edge of said skirt pcirtion being continuously and uninterruptedly rolled up to form a continuous, undistorted rounded bead extending completely around the edge of the skirt portion on the inside 'of the skirt portion, said bead being for its entire length of the same cross-sectional shape but being of gradually reduced cross-sectional diameter at several spaced areas along its length.

5. A closure cap having a top and dependent skirt portion, a bead formed on the lower edge of said skirt portion on the inside thereof, said bead being undistorted for its entire length and of the same cross-sectional shape and having portions of larger radii than other portions, said portions of larger radii being adapted to engage suitable projections on a. container without interrupting the continuity of the bead.

" DAVID A. SPRIGINGS. 

